If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.

I think baffels are a good idea, I have put them in all the tanks i have built they minimise fuel movement around the tank and keep a more constant fuel level around pickups especially when fuel levels are low.

Just bought a fuel cell from JAZ in Ca. yesterday they come with a poly foam that eliminates slosh completely...They ( JAZ ) are a VERY popular fuel cell manufacturer and the foam is standard in all thier cells.

You can buy the foam and have it put in to the tank you are having built. Or just buy one of the JAZ tanks if it will fit in the area that you want it. I put the foam into stock alum. tanks and mod. the fuel pick-up and they work quite well for performance use after this.

Baffle Design

The easiest is to create baffles is to weld in dividers (Number depends on width of tank) with round holes (about 2" in dia.) cut in each one at random points ...but stopping about 4" from the bottom. At the bottom of each divider cut a 2" long "U" that starts at the bottom of each divider and is spaced 3" apart along the divider. Place a "U"s at each bottom corner of the divider.

I assume you are also building in a sump. If not then this would be a good addition.

I always used a piece of plate alum welded in side to side and stopping about an inch above the bottom, one about every foot.

If you use foam you can buy it seperately, but put it in after you weld! You may have to change it every few years as some will deteriorate. Just use a see thru inline filter to check the condition. If you cut it right you can fit it in every tank. Keep in mind you will lose a little volumn.

In my race boat I use a normal Tempo plastic tank with the foam. Also keep in mind any provisions for tank senders.

Never argue with an idiot. They drag you down to their level, then beat you with experience.

Baffles

I would think with a 22" width three baffles would be enough and maybe even two.

As to the sump.... You want your fuel line out at the lowest point in the tank. A two inch deep sump would be OK if you make it about 8" wide and taper it from 1/2" (at the rear of the tank) to the full 2" at the front. I would have them weld in no smaller than an AN6 fitting to be used as the fuel line connect point. You should also put the return line as far away from the fuel oulet as possible. This will prevent aeration when the fuel get low.

Don't forget to test the tank for leaks before installing the tank in the boat.